Heinrich sattlek



No. 751,686. IPATENTED FEB. 9, 1904.

H. SATTLER. COMPENSATION PENDULUM.

APPLICATION FILED MAR.16, 1903.

Fag]

N0 MODEL.

No. 751,686. Patented February 9, 1904.

UNITED STATES PATENT OFFICE.

HEINRICH SATTLER, OF MUNICH, GERMANY, ASSIGNOR TO THE FIRM ()F ANDREAS HUBER, OF MUNICH, GERMANY.

COMPENSATION-PENDULUM.

SPECIFICATION forming part of Letters Patent No. 751,686, dated February 9, 1904.

Application filed March 16, 1903. Serial No. 147,960. No model.)

00% wh mi y m: In the drawings, 7) is the flat spring, to the Be it known that I, HEINRICH SATTLER, a lower end of which the weight 0 is attached. citizen of Germany, residing at Munich, Ba- This weight is reciprocated backward and forvaria, Germany, have invented certain new and ward around its center owing to the torsion 5 useful Improvements in Compensating Penof the spring 6. Attached to the weight a dulums; and I do hereby declare the following or to a plate fixed to the same is the bent strip to be afull, clear, and exact description of the of compound metal a, which is bifurcated at invention, such as will enable others skilled in its upper free end, as at (2, and embraces the the art to which it appertains to make and use flat springb loosely, butnotsufliciently loosely 1 the same. to allow the spring to turn in its bifurcation. The present invention relates to means for On a change of temperature the bent strip compensating pendulums, and more particua will be moved so that its forked end will larly to that class of pendulums known as either be moved higher up the spring 6 or rotary pendulums, in whichthe weight is lower down the same. This movement of 5 suspended from a thin flat spring and oscilthe forked end of the strip will determine the lates in a vertical plane by the torsion of the length of the spring which will be subjected spring. In order to compensate a pendulum to the torsion, and thus the length of the 5 of this class when changes of temperature spring will be varied according to changes occur. it is necessary to reduce or enlarge the in the temperature, and the pendulum will be 20 length of the torsional part of the suspendingaccurately compensated.

spring, and thus to correspondingly reduce or The strip a might be mounted at the top of enlarge the swing or rotary reciprocation of the springbinstead of at the bottom,and it need 7 the weight. This is effected according to the not necessarily be bent. It might be straight; present invention by providing a compound but when bent it takes up less room in the 5 metal strip which expands under different clock-casing. The bow (Z is merely provided temperatures and embraces with its end the in the embodiment of the invention illustorsional spring at different points of its trated to counterbalance the weight of the length, so that the said spring will be varied in strip at. its effective length according to the existing I claim as my invention- 3 temperature. 1. The combination with a pendulum sus- In order to render the present specification pended by a torsional spring, of a compound easily intelligible, reference is had to the acstrip of different metals having unequal sus- 8O companying drawings, in which similar letceptibility to changes of temperature, said ters of reference denote similar parts throughstrip having one end fixed in asuitable man- 35 out both views. ner and its other end bifurcated and embrac- Flgure 1 is a front elevatlon of the pendumg the torsional spring of the pendulum. lum; and Fig. 2 1s a plan view in section 2. A devlce for compensatlon-pendulums of 3 5 through the pendulum-spring, showing the the class specified, consisting of a strip of forked end of the compound metal bar emmetals of two different sorts joined along their 4 bracing the spring. length, said strip having one end forked to It is well known that if a compound bar embrace the flat spring of the pendulum and consisting of two suitable sorts of metals being bent round and having its opposite end 9 combined along their length is subjected to fixed to the weight of the pendulum. Variations of temperature it will be more or 3. The combination, with apendulum adapt- 45 less bent such, for instance, as a bar of Zinc ed to oscillate about its axis, of a strip formed and a bar of steel joined together along their of two metals which are unequally susceptible lengthor combination of many other sorts to expansion and contraction under changes of metal will act in the same way. of temperature, said strip mounted upon a suitable support and embracing the pendulum in such manner as to control its cfl ective length.

4. The combination, with a pendulum suspended by a torsional spring and adapted to oscillate about its axis under the influence of said torsional spring, of a strip formed of two metals of unequal susceptibility to changes of temperature, said strip mounted upon the pendulum and oscillating therewith and its free end embracing the torsional spring and controlling the elfective length thereof.

5. The combination, with a pendulum suspended by a torsional spring and adapted to oscillate about the axis of said spring, of a bent strip composed of longitudinally-united 

